Gary G. Singer, M.D.
NPI 1366439283ActiveIndividual· Internal Medicine, Nephrology· Saint Peters, MO
Internal Medicine, Nephrology (M.D.) with Midwest Nephrology Associates Inc, practicing in Saint Peters, Missouri. Their prescriptions cost Medicare Part D more than their services did: $298,136 for 1,631 claims, against $143,336 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 19 companies reporting payments in 2025, $8,807 in all, mostly grants. Lists Barnes-Jewish St Peters Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1366439283 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 5, 2005 |
| Last updated in NPPES | Aug 9, 2022 |
| Certified by provider | Aug 9, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 108436 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 559 |
|---|---|
| Services billed | 2,128 across 25 procedure codes |
| Paid by Medicare | $143,336 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,631 · 3,483 30-day fills |
|---|---|
| Patients | 378 |
| Total drug cost | $298,136 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Midwest Nephrology Associates IncSaint Peters, MO · 9 clinicians
Hospital affiliations
- Barnes-Jewish St Peters HospitalSaint Peters, MO
- Missouri Baptist Medical CenterSaint Louis, MO
- Progress West HospitalOfallon, MO
- Ssm St Joseph Health CenterSaint Charles, MO
- Ssm St Joseph Hospital WestLake Saint Louis, MO
Other facilities
- Davita O'Fallon Missouri DialysisDialysis facility · O Fallon, MO
- Davita St. Peters DialysisDialysis facility · Saint Peters, MO
- Fmc - WentzvilleDialysis facility · Wentzville, MO
- Fmc Dialysis Services of Lincoln CountyDialysis facility · Troy, MO
- Saint Charles County DialysisDialysis facility · Saint Peters, MO
Industry payments (Open Payments)
- 2025$8,807 · 48 payments from 19 companies
- 2024$22,500 · 79 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $7,340 | 10 |
| Novartis Pharmaceuticals Corporation | $188.85 | 7 |
| Akebia Therapeutics Inc | $143.45 | 2 |
| Apellis Pharmaceuticals, Inc. | $138.62 | 1 |
| Medtronic, Inc. | $133.70 | 1 |
What the 2025 payments were for
- Grant$5,000 · 1 payment
- Consulting Fee$1,960 · 1 payment
- Food and Beverage$1,847 · 46 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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